in the arm:
bicep contracts (agonist)
triceps relax (antagonist)
in the leg:
hamstrings contract (agonist)
quadriceps relaxes (antagonist)
remember the agonist is the muscle "agonising" to do the work - like pulling the joint.
muscles contract and relax by bring about movements.
They contract and relax
Muscles contract and relax to move a joint. ... Muscles contract at a constant rate. Muscles contract and relax to move a joint.
When you Bend your Leg your hamstring contracts and your quadriceps relax
Endorphins.
Muscles contain certain proteins called contractile proteins which enable it to contract and relax to bring about movements.
Contract and Relax
The internal intercostal muscles relax and the external intercostal muscles contract, pulling the ribcage upwards and outwards.
Do you mean "contract". Well, when muscles contract they get shorter and fatter. When they relax they get longer and thinner.
Muscles.
Skeletal muscles .
Bones themselves do not relax and contract; they are rigid structures that provide support and shape to the body. However, muscles attached to bones are responsible for movement and can contract and relax. When muscles contract, they pull on bones, facilitating movement of the skeletal system. This interaction between muscles and bones allows for various movements and functions in the body.